O-Desmethylvenlafaxine

O. tsutsugamushi PCR

Occult Blood

OCP

Ocular Swab - MC+S

Oculocutaneous Albinism Type 1 (TYR)

Oestradiol

Oestradiol-LCMS

Oestrogen

Oestrogen (Fluid)

Oestrogen (Paediatric-Ultra Sensitive)

Oestrone

OGTT

OGTT - Prolonged

OGTT with GH

OGTT with Insulins

OJ Autoantibody

Olanzapine

Oligoclonal Bands (CSF)

Oligosaccharides

OMMA

Onchocerca Serology

Onchocerciasis Serology

Optical Platelet Count

Oral Glucose Tolerance Test

Oral Glucose Tolerance Test with Growth Hormone

Oral Glucose Tolerance Test with Insulins

Oral Hypoglycaemic Screen

Orf virus PCR

Organic Acids (Spot Urine)

Organochlorines

Organophosphates

Orgaran Assay

Orientia PCR

Orientia tsutsugamushi Serology

Ornithosis Serology

Orotic Acid (Spot Urine)

Osmolality

Osmolality (Faecal)

Osmolality (Fluid)

Osmolality (Spot Urine)

Osmotic Fragility

Osteocalcin

Ovarian Antibody

Overnight 1mg Dexamethasone Suppression Test

Overnight Sleep Studies

Ovulation Tracking

Oxalate (24hr Urine)

Oxalate (Spot Urine)

Oxcarbazepine

Oxidative Burst

OxyHaemoglobin

Oxypurinol

Oxysterol